/Engine/Plugins/Slate/SlateScripting/Source/SlateScriptingCommands/Public/UICommandsScriptingSubsystem.h
To expose command lists from external systems to this subsystem, callFInputBindingManager::RegisterCommandListfrom the external system. The binding manager will then broadcast the registered command list to all subscribers.
virtual void Initialize ( [FSubsystemCollectionBase](API\Runtime\Engine\Subsystems\FSubsystemCollectionBase) & Collection )